Steam-generator.



Patented July 18, 1905.

PATENT OFFICE.

WILLIAM D. HOXIE, OF NEW YORK, N. Y.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 794,713, dated July 18, 1905.

Application filed April 9, 1904;. Serial No. 202.294.

To all, whom it may concern.-

' York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification, reference being had therein to the accom panying drawings.

This invention relates to water-tube steamgenerators of the Babcock & Wilcox design, wherein the group of water-tubes is inclined from a horizontal plane and which forms an enlarged combustion-space at one end of the furnace-chamber, said chamber being provided with a roof extending partially over the same which directs the gases of combustion to the enlarged end of the chamber and to the elevated end of the group of tubes, from whence said gases are directed across and among the group of tubes to the uptake.

The present invention consists in the employment of water-chambers at the respective ends of the group of water-tubes having a capacity greater than the series of separate headers usually employed and with which the group of water-tubes communicate collectively, and also in connecting said waterchambers by an independent series of watertubes located beneath the main group of tubes and in direct contact with the furnace-gases, and also in connecting said water-chamber respectively with water legs that extend downwardly to the base of the generator and form its support and are in turn connected with water-boxes or manifolds that form the side walls of the furnace-chamber, and which increase the water capacity of the generator and the efficient generating-surface,and which are fully supplied from the enlarged waterchambers that are elevated above said boxes, and, further, in providing a furnace-roof that partially covers the furnace placed directly above the independent series of tubes and provided with a clear horizontal space between the same and the lower series of the main group of tubes, this space being inclosed at the projecting end of the roof of the furnace by a cross-partition composed of hollow superposed sections, which partially encircle the adjacent tubes.

With the present improvements the water capacity of the generator is materially increased and an intermediate body of water carried in the path of its circulation, which compensates for changes in the quantity of water circulating through the tubes and side boxes and'always maintains a suflicient quantity therein.

Other obvious advantages are secured in the present structure when compared with the usual type of this generator, the sectional parts being comparatively light and more economically and readily manufactured and rendered more accessible for cleaning and repairs and as easily and conveniently transported and assembled at distant places, all as hereinafter set forth.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side interior view of a steam-generator of the type referred to which includes the main essential parts; Fig. 2, a detached view of the steam and water drum with a modified arrangement of the communicating circulating-tubes; Fig. 3, a similar view of one of the water-chambers connected with one end of the group of tubes and with auxiliary circulating-tubes located beneath the group and with water-legs and connecting water-boxes that form the side walls of the furnace in direct contact with the furnace-chamber. Fig. 4 is a view similar to Fig. 1, in which the shape of the water-chamber at the respective ends of the group of tubes is circular and the connected ends of the water-tubes bent and formed to properly connect with the circular water-chamber. Fig. 5 is a side view, partly in section, of a special arrangement of the circulating-tubes represented in Fig. 2 and connected similar to the design shown in Fig. 4. Figs. 6 and 7 show enlarged detached views of constructive details; and Fig. 8, a front view divided to show a section on the line 3 3, Fig. 1, and a part with the front casing removed, all as hereinafter described.

In the several figures of the drawings corresponding parts are referred to by similar numerals of reference.

1 is the furnace-chain ber, provided with grate-bars 2 and firing-door-3; 4, the inclined group of water-tubes; 5, the water-chambers connecting the opposite ends of the group of tubes; 6, the elevated steam and water drum; 7, the circulating-tubes connecting with the rear water-chamber and the steam and water drum; 8, the circulating-tubes connecting the steam and water drum with the front waterchamber; 9, a series of auxiliary water-tubes connecting the respective water-chambers arranged beneath the main group of water-tubes and exposed directly to thefurnace-gases; 10, water-legs connecting with the respective water-chambers and with each other to boxes or manifolds 11 and which form the side walls of the furnace -chamber; 12, a roof placed amabove the series of tubes 9 and extending -partly over the furnace-chamber; 13 14:, partitions or baffles located, as shown, to direct the gases of combustion from the furnacechamber across the group of inclined watertubes, and 15 the uptake through which the smoke and consumed gases escape, the arrows indicating the course of the gases through the several spaces.

The form of the water-chambers 5 may be constructed as shown in Figs. 1 and 3, in which the side connecting with the group of watertubes is made flat, or, as shown in Figs. 1 and 6, the form may becircular and the several water-tubes forming the group may be bent or curved at their ends to connect on a direct radius with the circular shell of the waterchambers. The water-chambers and steam and water drum are provided with manholes and cover-plates, through which access to the interior may behad for cleaning or inspecting the connected water-tubes or in replacing or removing the tubes, one or more-openings 20 being provided in linewith the tubes through which the latter may be passed.

Space 15 is provided between the group of water-tubes 4 and the roof 12, and a crosspartition 16 is placed at the inner end of the roof, which serves to inclose that part ofthe space above the roof and forms a base of the baffle 13, fire-bricks being arranged adjacent thereto, if desired, to protect the same from the passing gases, as shown. These parts are shown enlarged in Figs. 6 andv 7 and include the detailsof construction in fitting the roof upon the adjacent tubes and in making up the partition of-short hollow superposed sections, which reduces their weight and renders them more convenient for placing or renewal, shouldered contact-surfaces to maintain them in relative position, and semicircular contactsurfaces to fit upon the adjacent tubes.

The-series of tubes9 may be connected with the front water-chamber by means of an interposed cross-box or manifold l9'and corre- 5 sponding openings provided at the opposite or front side of the manifold through which access may be had to the respective tubes for removing or replacing the same- The tubes 9 may be of iejsame diameter as the tubes forming the gopp, as shown in Figs. 3 and 4, or of different size, as shown in Figs. 1 and 5. In the use of these tubes of different size or number the quantity of the circulating water is regulated, and the number or size of the circulating-tubes 7 connecting the steam and water drum 6 with the water-chambers 5, may also be varied to suit a proper circulation of the water.

The boxes or manifolds 11, which form the side walls of the furnace-chamber, as shown, are preferably of rectangular shape in crosssection and present an unbroken surface to the chamber.

The water-legs 10 arelocated at the respecti e corners of the generator and form supporting-columns for the generator. These water-legs are connected by the water-boxes 11, which form the sides of the furnace-chamber and communicate at the top with the waterchambers 5, which, owing to their large capacity, will always maintainan abundant supply of water to the boxes 11. When the furnacespace is divided into two or more chambers,

intermediate water-legs and similarside walls connecting therewith and with the waterchambers may be used.

In Figs. 2 and 5 a series of tubes 21 are introduced which connect the steam-space of the rear water-chamber 5 and the steam-space of the drum 6. These tubes serve toincrease the steam-space and are passed through .the combustion-space to superheat the contained steam. termediate body of water in greater quantity than any of the communicating parts and are located in the path of its circulation and serve to maintain a sufficient quantity of water in all the water-tubes and communicating waterlegs and side boxes.

Minor devices, such asa deflector 17 and openings 18, are shown, the latter serving to accommodate the passage of cleaning'devices to the interior spaces.

Having thus fully described my invention, what I claim, and desire to secure by. Letters Patent, is

l. A steam-generator comprising in combination a group of inclined water-tubes connected at its opposite ends with enlarged water-chambers; a communicating steam and water drum located above said group of watertubes; a furnace-chamber located beneath the group of water-tubes, water-legs connectedto and communicating with the respectivewater-chambers extending to or below the furnace-grate, and water-boxes communicating with the water-legs and forming walls of the furnace chamber, the enlarged water chambers being of a capacity equal to or exceeding the capacity of the communicating water-legs The water-chambers 5 provide an in- IIO and connecting water-boxes, whereby the latter are kept constantly filled, as set forth.

2. A steam-generator comprising in combination a group of inclined water-tubes connected at its opposite ends with enlarged water-chamloers; a communicating steam and water drum located above said group of watertubes; a furnace-chamber located beneath the group of water-tn hes; a series of enlarged water-tubes communicating with the enlarged water-chambers and located between the group of inclined Wafer-tubes and the furnace-chamber; water-legs connected to and communicating with the respective water-chambers extending to or below the furnace-grate, and water-boxes communicating with the waterlegs and forming walls of the furnace-chamher, the enlarged water-chambers being of a capacity equal to or exceeding the capacity of the communicating water-legs and connecting water-boxes, whereby the latter are kept constantly filled, as set forth.

3. A steam-generator comprising in combination a group of inclined water-tubes connected at its opposite ends with enlarged water-chambers; a transverse steam and water drum located above said group of water-tubes and communicating with said water-chambers; a furnace-chamber located beneath the group of water-tubes; water-legs connected to and communicating with the respective waterchambers extending to or below the furnacegrate, and water-boxes communicating with the water-legs and forming walls of the furnace-chamber, the enlarged water-chambers being of a capacity equal to or exceeding the capacity of the communicating water-legs and connecting Water-boxes, whereby the latter arekept constantly filled, as set forth.

4. A sectional partition for tubular boilers placed between rows of adjacent tubes, each section being made of two hollow separate parts superposed, and each part having a semicircular side to fit adjacent tubes for maintaining the section in a fixed position therewith, and the contact-surfaces of each separable part having a shoulder to maintain said parts in proper relative position.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM D. HOXIE.

Witnesses:

EUGENE P. TERRY, CHAS. W. FORBES. 

